package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    private final static String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        Map<String,String> map = new HashMap<>(); //微信登录接口要求传入四个参数
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode()); //从小程序端传入该code
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL,map); //向微信服务器发送请求获取openid
        JSONObject jsObject = JSON.parseObject(json); //解析json
        String openid = jsObject.getString("openid"); //取出用户唯一标识 openid

        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        User user = userMapper.selectByOpenId(openid);
        if(user==null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;

    }
}
